Difficulty: Easy
Correct Answer: Rare
Explanation:
Given data
Meaning
Infrequent = occurring seldom; not happening often; rare.
Option analysis
Frequent/Regular/Common — all mean “happening often”; these are antonyms.Rare — happens seldom; best synonym.
Common pitfalls
Do not confuse “infrequent” with “irregular.” Something can be infrequent yet still occur at regular intervals (e.g., quarterly).
Final Answer
Rare
Discussion & Comments